package thread;

import java.util.Scanner;

public class SleepDemo {
    public static void main(String[] args) {
        System.out.println("程序开始了");
        Scanner scanner = new Scanner(System.in);

        for (int num=scanner.nextInt();num>0;num--) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(num+"s");
        }
        System.out.println("程序结束了");

    }
}
